Quarterly report pursuant to Section 13 or 15(d)

STOCK BASED COMPENSATION (Details) - Stock options outstanding and exercisable under the Stock Option Plan

STOCK BASED COMPENSATION (Details) - Stock options outstanding and exercisable under the Stock Option Plan - $ / shares	6 Months Ended
	Apr. 30, 2020	Apr. 30, 2019
Range Of Exercise Prices $0.67 To $17.00 [Member] \| 2003 Share Plan [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Options Outstnding and Exercisable, Numbers		8,000
Options Outstanding and Exercisable, Weighted Average Remaining Contractual Life		164 days
Options Outstanding and Exercisable, Weighted Average Exercise Price (in Dollars per share)		$ 2.34
Range Of Exercise Prices $0.67 To $2.30 [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Options Outstanding, Number	561,500
Options Outstanding,Weighted Average Remaining Contractual Life	6 years 10 days
Options Outstanding, Weighted Average Exercise Price (in Dollars per share)	$ 1.56
Options Exercisable, Number	480,250
Options Exercisable,Weighted Average Remaining Contractual Life	5 years 306 days
Options Exercisable, Weighted Average Exercise Price (in Dollars per share)	$ 1.66
Range Of Exercise Prices $2.58 To $3.13 [Member] \| 2010 Share Plan [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Options Outstanding, Number	853,200
Options Outstanding,Weighted Average Remaining Contractual Life	3 years 102 days
Options Outstanding, Weighted Average Exercise Price (in Dollars per share)	$ 2.79
Options Exercisable, Number	853,200
Options Exercisable,Weighted Average Remaining Contractual Life	3 years 262 days
Options Exercisable, Weighted Average Exercise Price (in Dollars per share)	$ 2.79
Range Of Exercise Prices $3.46 To $5.75 [Member] \| 2010 Share Plan [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Options Outstanding, Number	534,534
Options Outstanding,Weighted Average Remaining Contractual Life	7 years 251 days
Options Outstanding, Weighted Average Exercise Price (in Dollars per share)	$ 4.16
Options Exercisable, Number	407,034
Options Exercisable,Weighted Average Remaining Contractual Life	7 years 197 days
Options Exercisable, Weighted Average Exercise Price (in Dollars per share)	$ 4.38
Range Of Exercise Prices $0.67 [Member] \| 2010 Share Plan [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Options Outstanding, Number		938,000
Options Outstanding,Weighted Average Remaining Contractual Life		6 years 69 days
Options Outstanding, Weighted Average Exercise Price (in Dollars per share)		$ 0.67
Options Exercisable, Number		776,750
Options Exercisable,Weighted Average Remaining Contractual Life		5 years 284 days
Options Exercisable, Weighted Average Exercise Price (in Dollars per share)		$ 0.67
Range Of Exercise Prices $0.67 [Member] \| Stock Options Not Granted Under 2003 Share Plan 2010 Share Plan Or 2018 Share Plan [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Options Outstnding and Exercisable, Numbers		1,046,000
Options Outstanding and Exercisable, Weighted Average Remaining Contractual Life		3 years 109 days
Options Outstanding and Exercisable, Weighted Average Exercise Price (in Dollars per share)		$ 0.67
Range Of Exercise Prices $2.27 To $3.01 [Member] \| 2010 Share Plan [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Options Outstanding, Number		610,134
Options Outstanding,Weighted Average Remaining Contractual Life		4 years 25 days
Options Outstanding, Weighted Average Exercise Price (in Dollars per share)		$ 2.58
Options Exercisable, Number		610,134
Options Exercisable,Weighted Average Remaining Contractual Life		4 years 25 days
Options Exercisable, Weighted Average Exercise Price (in Dollars per share)		$ 2.58
Range Of Exercise Prices $3.46 To $7.00 [Member] \| 2010 Share Plan [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Options Outstanding, Number		474,534
Options Outstanding,Weighted Average Remaining Contractual Life		8 years 226 days
Options Outstanding, Weighted Average Exercise Price (in Dollars per share)		$ 4.13
Options Exercisable, Number		193,284
Options Exercisable,Weighted Average Remaining Contractual Life		7 years 233 days
Options Exercisable, Weighted Average Exercise Price (in Dollars per share)		$ 4.57
Range Of Exercise Prices $3.70 [Member] \| 2018 Share Plan [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Options Outstanding, Number	3,100,000
Options Outstanding,Weighted Average Remaining Contractual Life	8 years 10 days
Options Outstanding, Weighted Average Exercise Price (in Dollars per share)	$ 3.70
Options Exercisable, Number	1,566,666
Options Exercisable,Weighted Average Remaining Contractual Life	8 years 10 days
Options Exercisable, Weighted Average Exercise Price (in Dollars per share)	$ 3.70
Range Of Exercise Prices $3.84 To $4.61 [Member] \| 2018 Share Plan [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Options Outstanding, Number	1,635,000
Options Outstanding,Weighted Average Remaining Contractual Life	8 years 335 days
Options Outstanding, Weighted Average Exercise Price (in Dollars per share)	$ 3.88
Options Exercisable, Number	541,113
Options Exercisable,Weighted Average Remaining Contractual Life	8 years 135 days
Options Exercisable, Weighted Average Exercise Price (in Dollars per share)	$ 3.75
Range Of Exercise Prices $3.70 To $4.61 [Member] \| 2018 Share Plan [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Options Outstanding, Number		3,470,000
Options Outstanding,Weighted Average Remaining Contractual Life		9 years 10 days
Options Outstanding, Weighted Average Exercise Price (in Dollars per share)		$ 3.73
Options Exercisable, Number		1,156,947
Options Exercisable,Weighted Average Remaining Contractual Life		9 years 7 days
Options Exercisable, Weighted Average Exercise Price (in Dollars per share)		$ 3.72
Range Of Exercise Prices $2.58 [Member] \| Stock Options Not Granted Under 2003 Share Plan 2010 Share Plan Or 2018 Share Plan [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Options Outstnding and Exercisable, Numbers	1,698,000
Options Outstanding and Exercisable, Weighted Average Remaining Contractual Life	2 years 3 months
Options Outstanding and Exercisable, Weighted Average Exercise Price (in Dollars per share)	$ 2.58
Range Of Exercise Prices $2.58 To $5.56 [Member] \| Stock Options Not Granted Under 2003 Share Plan 2010 Share Plan Or 2018 Share Plan [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Options Outstnding and Exercisable, Numbers		734,000
Options Outstanding and Exercisable, Weighted Average Remaining Contractual Life		2 years 310 days
Options Outstanding and Exercisable, Weighted Average Exercise Price (in Dollars per share)		$ 2.88